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Cheap flights from Knoxville to Lisbon from $538

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

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Air Canada Logo
7:20 pm - 9:20 amTYS-LIS
33h 00m2 stops
Air Canada Logo
11:20 am - 2:49 pmLIS-TYS
32h 29m2 stops
$538Air Canada
Find Deal
Wed, Jan 7 - Sat, Jan 17
United Airlines Logo
5:45 am - 10:15 amTYS-LIS
23h 30m1 stop
United Airlines Logo
11:20 am - 10:13 amLIS-TYS
51h 53m2 stops
$543United Airlines
Find Deal
Mon, Dec 1 - Sat, Dec 13
Multiple Airlines Logo
7:44 am - 6:55 amTYS-LIS
18h 11m1 stop
Multiple Airlines Logo
10:30 am - 8:56 pmLIS-TYS
15h 26m1 stop
$555Multiple Airlines
Find Deal
Wed, Jan 7 - Sat, Jan 17
Multiple Airlines Logo
6:00 am - 6:55 amTYS-LIS
19h 55m2 stops
Multiple Airlines Logo
10:30 am - 8:56 pmLIS-TYS
15h 26m1 stop
$564Multiple Airlines
Find Deal
Wed, Jan 7 - Sat, Jan 17
Delta Logo
12:30 pm - 8:00 amTYS-LIS
15h 30m2 stops
Delta Logo
11:40 am - 11:44 pmLIS-TYS
17h 04m2 stops
$749Delta
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Fri, Mar 27 - Tue, Mar 31
British Airways Logo
2:58 pm - 5:45 pmTYS-LIS
21h 47m2 stops
British Airways Logo
3:55 pm - 9:21 pmLIS-TYS
34h 26m2 stops
$856British Airways
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Sun, Dec 14 - Sat, Dec 20
United Airlines Logo
9:40 am - 9:20 amTYS-LIS
19h 40m2 stops
United Airlines Logo
12:20 pm - 10:00 amLIS-TYS
26h 40m1 stop
$863United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
British Airways Logo
7:00 am - 9:05 amTYS-LIS
21h 05m1 stop
British Airways Logo
6:40 pm - 9:21 pmLIS-TYS
31h 41m2 stops
$865British Airways
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Sun, Dec 14 - Sat, Dec 20
British Airways Logo
7:00 am - 9:05 amTYS-LIS
21h 05m1 stop
British Airways Logo
3:55 pm - 9:21 pmLIS-TYS
34h 26m2 stops
$866British Airways
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Sun, Dec 14 - Sat, Dec 20
Lufthansa Logo
7:20 pm - 11:30 pmTYS-LIS
23h 10m2 stops
Lufthansa Logo
6:10 am - 8:20 pmLIS-TYS
19h 10m2 stops
$1,278Lufthansa
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Sat, Nov 22 - Sat, Nov 29

United Airlines flights from Knoxville to Lisbon

Our best United Airlines deals on Knoxville to Lisbon flight tickets
United Airlines
Oct 28
TYS9:50 amKnoxville McGhee Tyson
20h 25m
1 stop
LIS10:15 amLisbon Humberto Delgado
Nov 4
LIS5:00 amLisbon Humberto Delgado
23h 59m
2 stops
TYS11:59 pmKnoxville McGhee Tyson
$541
Find similar
United Airlines
Dec 1
TYS5:45 amKnoxville McGhee Tyson
23h 30m
1 stop
LIS10:15 amLisbon Humberto Delgado
Dec 13
LIS11:20 amLisbon Humberto Delgado
51h 53m
2 stops
TYS10:13 amKnoxville McGhee Tyson
$543
Find similar
United Airlines
Oct 24
TYS8:50 amKnoxville McGhee Tyson
18h 30m
2 stops
LIS8:20 amLisbon Humberto Delgado
Nov 4
LIS5:00 amLisbon Humberto Delgado
22h 55m
2 stops
TYS10:55 pmKnoxville McGhee Tyson
$691
Find similar

Air Canada flights from Knoxville to Lisbon

Our best Air Canada deals on Knoxville to Lisbon flight tickets
Air Canada
Jan 7
TYS7:20 pmKnoxville McGhee Tyson
33h 00m
2 stops
LIS9:20 amLisbon Humberto Delgado
Jan 17
LIS11:20 amLisbon Humberto Delgado
32h 29m
2 stops
TYS2:49 pmKnoxville McGhee Tyson
$538
Find similar
Air Canada
Oct 24
TYS9:55 amKnoxville McGhee Tyson
17h 25m
3 stops
LIS8:20 amLisbon Humberto Delgado
Nov 4
LIS11:20 amLisbon Humberto Delgado
17h 39m
3 stops
TYS11:59 pmKnoxville McGhee Tyson
$1,358
Find similar
Air Canada
Oct 24
TYS9:55 amKnoxville McGhee Tyson
17h 25m
3 stops
LIS8:20 amLisbon Humberto Delgado
Nov 4
LIS11:20 amLisbon Humberto Delgado
17h 39m
3 stops
TYS11:59 pmKnoxville McGhee Tyson
$1,948
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 22, 2025.
Use the filters below to find and compare flights from Knoxville to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

7:20 pm-9:20 am

2 stops33h 00m

Lisbon Humberto Delgado

Sat 1/17

11:20 am-2:49 pm

2 stops32h 29m

$538

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Mon 12/1

5:45 am-10:15 am

1 stop23h 30m

Lisbon Humberto Delgado

Sat 12/13

11:20 am-10:13 am

2 stops51h 53m

$543

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

7:44 am-6:55 am

1 stop18h 11m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-8:56 pm

1 stop15h 26m

$555

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

6:00 am-6:55 am

2 stops19h 55m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-8:56 pm

1 stop15h 26m

$564

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 3/27

12:30 pm-8:00 am

2 stops15h 30m

Lisbon Humberto Delgado

Tue 3/31

11:40 am-11:44 pm

2 stops17h 04m

$749

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 12/14

2:58 pm-5:45 pm

2 stops21h 47m

Lisbon Humberto Delgado

Sat 12/20

3:55 pm-9:21 pm

2 stops34h 26m

$856

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 3/27

9:40 am-9:20 am

2 stops19h 40m

Lisbon Humberto Delgado

Tue 3/31

12:20 pm-10:00 am

1 stop26h 40m

$863

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 12/14

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Sat 12/20

6:40 pm-9:21 pm

2 stops31h 41m

$865

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 12/14

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Sat 12/20

3:55 pm-9:21 pm

2 stops34h 26m

$866

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 11/22

7:20 pm-11:30 pm

2 stops23h 10m

Lisbon Humberto Delgado

Sat 11/29

6:10 am-8:20 pm

2 stops19h 10m

$1,278

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Lisbon from

How to get the cheapest flight ticket from Knoxville to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

In general, February is the cheapest month to fly from Knoxville to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $638. If you are unable to visit Lisbon during the month of February, then departing from Knoxville during the month January is also very affordable. Most momondo users find prices during this month for around $669.

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $819. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Lisbon for around $1,534.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is in the morning when flights can be purchased for as low as $745. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,134 on average. Flights to Lisbon from Knoxville in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Knoxville to Lisbon flights?

You could potentially save up to 11% on your flight if you consider stops on a Knoxville to Lisbon flight.

When to book flights from Knoxville to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Lisbon according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Direct flights

None
There are no direct flights from Knoxville to Lisbon. There are no popular flight routes from Knoxville to Lisbon.
Search flight deals

  • How far is Knoxville McGhee Tyson to Lisbon Humberto Delgado by plane?

    Lisbon Humberto Delgado is 3990.0 mi away from Knoxville McGhee Tyson. 9h 31m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

  • What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

    The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Knoxville to Lisbon?

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $589Free CancellationRating
6.7
7,466 reviews
Search British Airways flights
American AirlinesPriceFrom $602Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights
United AirlinesPriceFrom $619Free CancellationRating
7.4
8,988 reviews
Search United Airlines flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Ericeira
Nazaré
Oeiras
Setúbal
Peniche
Estoril
Leiria
Sesimbra
Tomar
Almada
Evora
Zambujeira do Mar
Batalha
Figueira da Foz
Óbidos
Torres Vedras
Comporta
Sines

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Lisbon?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Lisbon. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Lisbon with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Lisbon flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Lisbon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Knoxville.

I’m not ready to book a flight from Knoxville to Lisbon right now. Can momondo alert me if prices change?

Price alerts on flights to Lisbon from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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